we are now trying out recommendations to help you discover great apps from the Microsoft Store under Recommended on the Start menu. This will appear only for Windows Insiders in the Beta Channel in the U.S. and will not apply to commercial devices (devices managed by organizations). This can be turned off by going to Settings > Personalization > Start and turning off the toggle for “Show recommendations for tips, app promotions, and more”.
Windows 11 has ads NOW, in the enterprise install I’m provided at work.
https://blogs.windows.com/windows-insider/2024/04/12/announcing-windows-11-insider-preview-build-22635-3495-beta-channel/